Dependent events: check 1
Difficulty: ★★☆Info
Maths4U Original · Short practice
A container has 15 red and 6 blue counters. Two are selected uniformly, one after the other, without replacement.
Find the probability that both are red.
Enter one number or fraction. Use at least six decimal places when needed; a distribution calculator may be used for probabilities.
Dependent events: review variant 1
Difficulty: ★★☆Info
Maths4U Original · Short practice
A container has 16 red and 3 blue counters. Two are selected uniformly, one after the other, without replacement.
Find the probability that both are red.
Enter one number or fraction. Use at least six decimal places when needed; a distribution calculator may be used for probabilities.
Dependent events: check 2
Difficulty: ★★☆Info
Maths4U Original · Short practice
A container has 16 red and 3 blue counters. Two are selected uniformly, one after the other, without replacement.
Find the probability of different colours.
Enter one number or fraction. Use at least six decimal places when needed; a distribution calculator may be used for probabilities.
Dependent events: review variant 2
Difficulty: ★★☆Info
Maths4U Original · Short practice
A container has 17 red and 4 blue counters. Two are selected uniformly, one after the other, without replacement.
Find the probability of different colours.
Enter one number or fraction. Use at least six decimal places when needed; a distribution calculator may be used for probabilities.
Dependent events: check 3
Difficulty: ★★☆Info
Maths4U Original · Short practice
A container has 17 red and 4 blue counters. Two are selected uniformly, one after the other, without replacement.
Given that the second counter is red, find the probability that the first was red.
Enter one number or fraction. Use at least six decimal places when needed; a distribution calculator may be used for probabilities.
Dependent events: review variant 3
Difficulty: ★★☆Info
Maths4U Original · Short practice
A container has 18 red and 5 blue counters. Two are selected uniformly, one after the other, without replacement.
Given that the second counter is red, find the probability that the first was red.
Enter one number or fraction. Use at least six decimal places when needed; a distribution calculator may be used for probabilities.
Dependent events: check 4
Difficulty: ★★☆Info
Maths4U Original · Short practice
A container has 18 red and 5 blue counters. Two are selected uniformly, one after the other, without replacement.
Find the probability that both are blue.
Enter one number or fraction. Use at least six decimal places when needed; a distribution calculator may be used for probabilities.
Dependent events: review variant 4
Difficulty: ★★☆Info
Maths4U Original · Short practice
A container has 19 red and 6 blue counters. Two are selected uniformly, one after the other, without replacement.
Find the probability that both are blue.
Enter one number or fraction. Use at least six decimal places when needed; a distribution calculator may be used for probabilities.